In the mummification process, organs were removed to allow the preservation of the body. At the same time, the deceased needed them for his afterlife. For this reason, the four most important organs, aside from the heart, were embalmed separately, and stored in four corresponding vessels, called canopic jars. These were the liver, lungs, stomach, and intestines. They came to be placed under the protection of one deity each, collectively known as the Four Sons of Horus, each of whom was depicted with the head of a different animal: Imsety (human) who was responsible for the liver, Hapy (baboon) for the lungs, and Duamutef (jackal) and Qebehsenuef (falcon) for the stomach and intestines respectively.